<template>
  <div class="list" ref="wrapper">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div
                 class="button-wrapper"
                 v-for="item of hot"
                 :key="item.id"
                 @click="handleCityClick(item.name)"
                >
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div class="area"
             v-for="(item, key) of cities"
             :key="key"
             :ref="key"
        >
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div
                 class="item border-bottom"
                 v-for="innerItem of item"
                 :key="innerItem.id"
                 @click="handleCityClick(innerItem.name)"
                >
                {{innerItem.name}}
                </div>
            </div>
        </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper, {
      click: true
    })
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
        line-height: .5s4rem
        background: #eee
        padding-left: .2rem
        color: #666
        font-size: .26rem
    .button-list
        overflow: hidden
        padding: .1rem .6rem .1rem .1rem
        .button-wrapper
          float: left
          width: 33.33%
          .button
            margin: .1rem
            padding: .1rem 0
            text-align: center
            border: .02rem solid #ccc
            border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        color: #666
        padding-left: .2rem
</style>
